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Tumor profile of novel p53 heterozygous Tg.AC (v-Ha-ras) bitransgenic mice treated with benzo(a)pyrene and fed dietary N-acetyl-L-cysteine (NAC).

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We designed a novel short-term bitransgenic model to better characterize the effects of benzo(a)pyrene (BP) exposure on multi-organ carcinogenesis and to evaluate the effects of a well-recognized antioxidant, N-acetyl-L-cysteine (NAC), on neoplasia. We selected the p53 heterozygous Tg.AC (v-Ha-ras)

Hydrogen sulfide enhances nitric oxide-induced tolerance of hypoxia in maize (Zea mays L.).

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UNASSIGNED Our data present H 2 S in a new role, serving as a multi-faceted transducer to different response mechanisms during NO-induced acquisition of tolerance to flooding-induced hypoxia in maize seedling roots. Nitric oxide (NO), serving as a secondary messenger, modulates physiological

Improvement of Agrobacterium-mediated transformation in Hi-II maize (Zea mays) using standard binary vectors.

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High-frequency transformation of maize (Zea mays L.) using standard binary vectors is advantageous for functional genomics and other genetic engineering studies. Recent advances in Agrobacterium tumefaciens-mediated transformation of maize have made it possible for the public to transform maize

Synergistic effect of antioxidant system and osmolyte in hydrogen sulfide and salicylic acid crosstalk-induced heat tolerance in maize (Zea mays L.) seedlings.

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Salicylic acid (SA), is a plant hormone with multifunction that is involved in plant growth, development and the acquisition of stress tolerance. Hydrogen sulfide (H2S) is emerging similar functions, but crosstalk between SA and H2S in the acquisition of heat tolerance is not clear. Our recent study

Hydrogen sulfide acts as a downstream signal molecule in salicylic acid-induced heat tolerance in maize (Zea mays L.) seedlings.

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Salicylic acid (SA), 2-hydroxy benzoic acid, is a small phenolic compound with multifunction that is involved in plant growth, development, and the acquisition of stress tolerance. In recent years, hydrogen sulfide (H2S) has been found to have similar functions, but cross talk between SA and H2S in

Influence of diethyl maleate and cysteine on tissue glutathione and growth in broiler chickens.

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The objectives of this study were to determine the effects of diethyl maleate (DEM) and l-cysteine (L-Cys) on tissue glutathione (GSH) and growth in male broiler chickens. In Experiment 1, broilers were treated with DEM (0, 1.5, 3, 6, or 12.0 mmol/kg BW, i.p.). After 1 h, maximum GSH depletions were

Altered metabolic hormones, impaired nitrogen retention, and hepatotoxicosis in lambs fed Kochia scoparia hay.

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Livestock grazing lush Kochia scoparia (L.) Schrad, sometimes experience BW loss, hyperbilirubinemia, photosensitization, and polyuria. Animals fed kochia hay may exhibit milder or negligible signs of toxicosis but fail to utilize nutrients efficiently. To characterize early aspects of kochia

Metabolism and tissue distribution of orally administered trichloroethylene in male and female rats: identification of glutathione- and cytochrome P-450-derived metabolites in liver, kidney, blood, and urine.

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Male and female Fischer 344 rats were administered trichloroethylene (TRI) (2, 5, or 15 mmol/kg body weight) in corn oil by oral gavage, and TRI and its metabolites were measured at times up to 48 h in liver, kidneys, blood, and urine. Studies tested the hypothesis that gender-dependent differences

Characterisation of phenol oxidase and peroxidase from maize silk.

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Silk of some maize genotypes contains a high level of phenolics that undergo enzymatic oxidation to form quinones, which condense among themselves or with proteins to form brown pigments. Two phenolic oxidizing enzymes, peroxidase (POD; EC 1.11.1.7) and polyphenol oxidase (PPO; EC 1.10.3.1), from

[L-alanine: 2-ketoglutarate aminotransferase from maize embryo with complex kinetic properties for l-alanine (author's transl)].

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The activity of L-Alanine: 2-oxoglutarate aminotransferase (E.C. 2.6.1.2) has been studied in maize (Zea mays) embryo. Crude extracts were fractioned with ammoniun sulfate to obtain low activity preparations of other aminotransferases present in crude extracts. The enzyme shows normal hyperbolic

Purification and characterization of lysine-sensitive aspartate kinase from maize cell cultures.

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Aspartate kinase is a feedback-regulated enzyme that controls the first step common to the biosynthesis of lysine, threonine, isoleucine, and methionine in plants. Aspartate kinase was purified from Black Mexican Sweet maize (Zea mays L.) cell suspension cultures for physical and kinetic

Agrobacterium tumefaciens-mediated transformation of maize embryos using a standard binary vector system.

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We have achieved routine transformation of maize (Zea mays) using an Agrobacterium tumefaciens standard binary (non-super binary) vector system. Immature zygotic embryos of the hybrid line Hi II were infected with A. tumefaciens strain EHA101 harboring a standard binary vector and cocultivated in

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